MSA Advantage  420 Series Medium Threaded Cartridge Assembly features Facepiece, head cradle, elastic straps, buckle set, yoke with lever, two inhalation valves, two threaded cartridge Adapters and a exhalation valve. Latex-free cartridge is designed for Easy integration with other personal protective equipment. Cartridge featuring unique yoke and harness design permits the user to easily donning and doffing the state-of-the-art respirator while maintaining a customized fit. Cartridge easily switches between lock-down and drop-down mode. Cartridge has a over-mold Facepiece and face seal which offers an excellent fit and comfort to the user. This cartridge is also featured with ComforTop headband, a built-in moisture release chin cup hole and the extra-wide head and neck straps.